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Add 21/18 and 8/7

1st number: 1 3/18, 2nd number: 1 1/7

21/18 + 8/7 is 97/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 7 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    21/18 = 21 × 7/18 × 7 = 147/126
  3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
    8/7 = 8 × 18/7 × 18 = 144/126
  4. Add the two like fractions:
    147/126 + 144/126 = 147 + 144/126 = 291/126
  5. 291/126 simplified gives 97/42
  6. So, 21/18 + 8/7 = 97/42
    In mixed form: 213/42

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